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"Excellent improvement to the original Gilson Microman; particularly in user comfort (fits more easily in the hand, better suited to extended use). The new volume lock is also very good, stops any drift while in use."

"The Bio-Rad Duo-Flow HPLC system is easy to operate over a broad range of columns for biological separations and purification. I have experienced difficulties using the systems with high salt concentrations, however, leading to the motor becoming inoperable multiple times over a period of a few years, even with thorough cleaning after every use. The motor is easily replaceable and Bio-Rad technical support is generally very helpful."